Belt shifter



Feb. 8, 1927. 1,616,657

A. w. HAINES BELT SHIFTER Filed July 28, 1922 Iig l I IQVENTbR" BY I vATTO Eva.

Patented ,Feb. 8, 1927.

' AUGUST WILLIAM HAI Es, OEMF LWAUKEE, isconsin, essienoa or orinnnnnjroenonen gnua, on MILWA K E, wrsoensm.

Application filed July 28 shifting mechanism and is easily and con-,venlently operated.

A further object of the invention is to provide a belt shifter which isof simple construction, is strong and durable and is well adapted forthe purposes described.

' With the above and other objects in view,

the invention consists of the improved belt shifter and its parts andcombinations as set' forth in the claims, and all equivalents thereof.

In the accompanying drawing in which the same reference charactersindicate the same parts in all of the views:

Fig. 1 is a side view of two pulleys and the belt shifting mechanism inconnection therewith; p s v Fig." 2 is an enlarged view of the belt'shifter, but at right angles to Fig. 1; and

Fig. 3 is a cross-sectional detail view taken. on line 33 of Fig. 2 andon a larger scale. Referring to the drawing, the numeral 6 indicates aframe having a pair of upwardly extending bearings 7. and 8 in which are"- oluble shaft 9 is journaled. Said shaft carries a shouldered cam 10fast; thereon an' arm 11, a loose grooved pulley 12, and a, coiled sprin13 having one of its extremities secured to hearing 7, and the other topulley 12. Pulley 12 has secured to and partly surrounding it a chain 14which a when pulled, will give pulley 12 alimitedv rotation,the'rotation being limited by lug 15 carried on said pulley and stop 16secured to frame 6. Spring 13 retrieves said regulated by moving theextremity of con pulley to its normal position. Pulley 12 is furtherprovided with a bore 17 near its rim having therein a headed pin 18carrying a coiled spring 18. to yieldingly hold the pin in its outerposition and in which position it bears against the face cams 19. Theface cams .19. of the shouldered member 10 are engaged'by the pin 18 andthe said member 10 is also provided with a pair of inclined,semi-peripherially extendin outwardly tapering teeth 20 along the saidcam member.

the other.

lustrate the movement of members 11, 23, 24, 8

new srrrrrnn. v

1922. Serial No. 578,259. I

faces of which thedog 21 rides, and when in engagement with one of saidshoulders,

will prevent any retrograde'movement of Arm ll'mounted fast on theextremity of shaft 9 has a plurality of apertures 22 thru oneofwhichtheangular end of a connecting link 23 is secured. The outerangular extremity of the connecting link 23 is journaled in a slidableshifter 24:

provided with a pair. of downwardly dependng pins 25 and 26. Saidshifter moves through upright guides 27 and28 of frame 29 and the {pinspermit a belt 30 passing over a loose pulley 31 to move therebetweenand'when'the mechanism is operated, will move said belt from the loose afastpulley 32 and vice versa. 7 g

In operation, chain 14 is pulled down-.

pulley 31 t0 7 wardly by the operator until the movement of groovedpulley 10 is stopped by lug 15 and stop 16. Cam member 10 rotates withit to this point by means of the .engagement of pin 18 and a shoulder oftooth 19. During this movement, arm 11 has also been swung approximatelyone-half of a revolution and shifter 24, connected thereto, I is movedand the belt, between pins '25 and 26, is also moved from one of thepulleys to The dotted lines in Fig. 1 iland 30. The operator nextreleases chain 14. and grooved pulley 10 is retrieved by means ofcoiled'spring 13, pin 18 riding back overthe inclined faces of cams 19-until a shoulder isreached; During this movement dog 21 checksthe cammember from retrograde movement.

VVh'enit is desired'to reshift the belt, I

chain 14 is again pulled and the movement of'the parts is thesame exceptthat members 11, 28, 2d and 30 return from the positions shown in dottedlines in Fig. 1 to their normal positions; I f

The amount of travel of shifter 24 can be necting link 23 into any ofthe various apertures 22, I

From the foregoing description it will be seen that the belt shifter isof very simple construction and is well adapted'for the purposesdescribed- V Whatl claim as my invention is:

A belt shifting device, comprising a engaging member, a connecting linkhaving one end portion secured to the belt engaging belt member; arotary cam member for reciprocating the belt engaging member and havingdouble cam surfaces, means engaging said cam surfaces for preventingretrograde movement of the rotary cam, an arm revoluble with the rotarycam member and connected to the other end portion of said link, aretrieved member, a-yieldably mount ed pin projecting transversely fromone face of the retrieved member, and engaging the cam surfaces of therotary member to intermittently rotate said member, and means foractuating the retrieved member.

In testimony whereof, I affix my signature.

' AUGUST WILLIAM HAINES.

